Yarn twisting and package-coning apparatus



June 14, 1960A o. v. DRTINA YARN TwIsTING AND PACKAGE-comm; APPARATUS Filed Nov. 27, 1956 5 Sheets-Sheet l INVENTOR. Uffa l/. Drna BY Wafwm/ 'file AHORA/EY June 14, 1960 Q. v; DRTINA 2,940,244

YARN TwIsTING AND PACKAGE-COMING APPARATUS Filed NGV. 27, 1956 5 Sheets-Sheet 2 INVENTOR.

ATTORNEY June 14, 1960 o. v. DRTINA YARN TWISTING AND PACKAGE-CONING APPARATUS 5 Sheets-Sheet 5 Filed Nov. 27, 1956 ATTURNE Y June 14, 1960 o. v. DRTHNA YARN TwIsTING AND PACKAGE-COMING APPARATUS Filed Nov, 27, 1956 5 SheetsSheet 4 June 14, 196.0 o. v. DRTINA 2,940,244

YARN TWISTING AND PACKAGE-CONING APPARATUS Filed Nov. 27. 1956 5 Sheets-Sheet 5' Hallum,

z `1| E: l l/lll/l In i' a '08 IN1/M7012.

OTTO V. DRT/NA FIG. 9 BY www ATTORNEY United States Parent O YARN TWISTING AND PACKAGE-CONING APPARATUS Otto V. Drtina, 11426 W. Clifton Blvd., Cleveland 2, Ohio Filed Nov. 27, 1956, Ser. No. 624,649

Claims. (Cl. 57-98) This application is a continuation-impart of my copending application Serial No. 539,577, led October l0, 1955, and now abandoned and for Twister-Conor Spindle, With Yarn-Traverse Means, Mechanically Rotated Twister Coner, and Cap Drive Apparatus.

The present invention relates generally to twisting spindles with means for traversing synthetic yarns, and the like on same to form a package.

Heretofore, a common form of arrangement for twisting and packaging artificial material yarn uses a cylindrical bobbin mounted on a vertical axis for rotation and surrounded by a ring carrying a wire loop called the traveller, rotating freely about the bobbin. A free end of the yarn is passed through the loop and then wrapped around the bobbin and as the bobbin is rotated, the yarn wraps around the bobbin and moves with the traveller. The ring traverses axially up and down the cylinder so that the yarn is wrapped around the cylinder from one end to the other back and forth and twisted simultaneously. Among the disadvantages of such prior arrangements is that the traveller wears out and needs replacement as often as once a day, and, further, the yarn on the cylindrical bobbin has to be rewound by an 'additional step known as coning in order that the yarn may be easily rewound from the package. Further disadvantages arise due to complexities of initial threading and slow operative speeds necessitated by large strains imposed upon the yarn.

It has been known in the past to use a top cap for traversing, eliminating the ring and traveller and enabling the use of higher twisting speeds but with prior cap traverse there has been excessive friction of yarn causing breakage as well as excessive wear of the cap periphery.

It is an object of the lpresent invention to provide simple means for overcoming the above mentioned diiculties.

Another object is to provide apparatus which will eliminate coning as an additional separate operation.

Another object is to provide a novel twisting spindle with rotating cap to insure easier-threading while lessening yarn friction by correlating the speed of cap rotation with the speed of the spindle.

Broadly stated, the present invention meets these and other objects by providing a twisting spindle which not only simultaneously affords coning, but is combined with traverse means (cap, ring, or Whatever) mechanically rotated with the speed relationships so selected as to assure minimal drag of vwork material around the traverse means and minimal tension during the twisting. This is accomplished by reducing a component of force inuencing the tension in yarn, as hereafter explained, by having peripheral speed of package equal to so-called twisting speed (eg, speed at which yarn is fed) plus peripheral speed of the cap (or other traverse means). At the same time r.p.m. of work Windup or packaging spindle are varied to compensate for coning as well as buildup while preserving the above mentioned desirable relationship.

Other objects and advantages will become apparent and the invention may be'better understood from consideration of the following description taken in connection with the accompanying drawings in which:

Fig. l is a side elevational view, partly in section, of a portion of a twister frame having a packagc-coning Vspindle surrounded bya cap with means for separately driving coner and cap in accordance with the invention;

Fig. 2 is a front elevation of the apparatus of Fig. 41 but with the cap and associated parts shown in a lower position;

Fig. 3 is a cross-sectional view of the spindle just above the package as taken along the lines 3-3 of Fig. l; j

Fig. 4 is a diagrammatic view of apparatus according to the invention but shown in connection with two twisting and coning spindles;

Fig. 5 is an elevation view, partly broken away, to show the operation of a conventional V-belt variable drive;

Fig. 6 is a detail of a portion of the apparatus Vshown in Fig. 4 and for driving the speed adjustment system of the V-belt variable drive;

Fig. 7 is a side elevation view of apparatus incorporating modications; e

Fig. 8 is an elevation of apparatus viewed as in Fig. 7 but showing other details for producing yarn packages of certain shape and as described and claimed in this application;

Fig. 9 is a side elevation of a modification of such apparatus.

Referring first to Figs. l and 2, l have shown a main frame stand l with a conventional spindle rail 2 and a more or less conventionai top angle-iron bracket 3. Although but one spindle is shown in the drawing, it will be understood by those in the art that the rails 2 and 3 (and the rail 3i hereafter Vto be described), as shown with broken away ends in Fig. 2, may extend a distance sumcient to accommodate many spindles. AAt each such location a stationary `bracket 4 is bolted to the rail for supporting the novel rotating cap and twisting and spindle apparatus of the invention. Secured` with respect to bracket 4 is a downwardly extending housing 5 having a journal bearing 6 in which a cap rotating pulley '7 is axially held against bearing 6 by an upper bearing 8. The bore of pulley '7 is provided with splines designed to mate lwith corresponding splines on an axially movable cap rotating shaft 9.

Loosely journalled around shaft 9 is a package spindle sleeve 2) provided with a ball bearing 2l securely he'ldlhy a ring 22 associated with an upper collar portion 23 vo'f the stationary bracket d. A coning spindle drive pulley 24 is mounted to rotate the sleeve 2i? as by being, keyed thereto. Pulley 24 also drives a cone support dis'c 25 for positive drive of a yarn package 26 thereon. If desired a paper cone 27 may be used in conventional manner, to assure cone buildup and to prevent the yarn from falling oii the cone shaped package.` A centering knob 28 may be secured to sleeve 2i? to center the package 25 (or paper cone 27) and hold it against the disc 25.

In order that the yarn wil be wrapped around the cone from one end to the other back and forth, traverse mechanism for repeatedly elevating and lowering a cap twister 3S includes means such as the rail 3l shown made of angle-iron to provide vertical traverse motion, for example of six inches, and usable to also provide a top taper 29 on package 26. Mounted for vertical movement with rail 31 is a vertically extending tube 32. Preferably the tube is mounted in such manner as to enable slight adjustmentrof cap height with respectY to f At` each spindle location (of which only one in Figs. l and,2r) there is amore; or less conventional pigheight of package spindle.

- vided with a bottom bearing'Y 33 and may be provided Y VWith a lubricating oil ll pipe 34. Tube 32 is mounted for reciprocal movement into and through the stationary housingv 5, andiatvthepoint where the tube 32enters Y the Ys u'ppiortlSaa drip-proof seal 35 may be included.. The

upper Vend of thetube 32 supports the lower end of the' xally movable cap rotating shaft 9.

-tail devicewhich may comprise anV angle holder 36 se- ?cure'd with respect to the frame to provide for easy replenishing vof package. t

`Wor' k material such as yar-n 40 is fed at uniform speed -(except*at'starting) from `a ydelivery Vroll 41 rotatably mounted in a bracket 42 securely fastened totheV angleiron bracket 3. On the bracket 42 there may be a more for less conventional pin 43 with a rotatable sleeve 44 Y' several turns 45 of threads or yarn wound around idilin'41 a'ndrollerY 43 for a positive grip of the'maften'al and'thefeed thereto toV the spindle. Drum' 41 is duiven bypspur gearing 46, 47 assumed power driven at constant speed, while pin roller 44 is free to rotate The apparatus maybe pro-V while, each upperV cap 30 is driven by a lower pulley 7,

' and as see'il'i Fig'. 4, this/niay be through the of one of several lower belts 61. For the purpose of dsecription it is assumed that a motor 62 drives the shaft 63 at constant speed to operate pulleys 64, belts 61, pulleys 7, and hence caps 30 at constant speed, and

isj shown meanwhile the same shaft 63 throughthe medium of a somewhat conventional `V-b'eltvariable drive indicated generallyat 65,*.drives a shaft and consequently pulleys 67, belts 60, pulleys L24, and packages'26 at an Y adjustably varied speed."

fdetermined by the wind Yof material around theudrum` and Y roller.

operated ybrake mechanism may, as shown in Fig. k2, comprise a foot pedal 50,' cable 51, and a brake shoe'52 'operating on the upper pulley 24, andra brake shoevv53 -operating on the lower pulley 7 with springs 54, 55, respectively, operative to hold the brakes normally in `Yopen position.

' A principal object Vof the present invention is to minimizethe drag of the yarn around the edge of the traverse fmeans and'to do` this I rind it necessary to correlate l-speed of the yarn and correlate these'speeds with the speed of the yarn cap in a relationship which will become more clear as the description proceeds.

pect of this relationship is minimizing the components vof forces effecting the tension in the yarn.

For the purpose of easy exchange ofY packages, V'a foot One as- Y the'npm. speed of the cone spindle with the linear feed Y As explained indetail in connection with Fig. 5, the t speed of shaft 66 is adjusted bythe turning of a hand crank 68 ,on mechanically bythe turning of an attached pinion gear 69 through the medium of a spur gear 70 which in turn is controlled'by a rcarn`operated compensation as hereafter explained in connection with the description of Fig. 6. I-nrgeneral this constitutes the traverse mechanismwhichhas -a framework 72. A `worm 73 secured togroiate with theV constant speed "shaft 63 ldrivesya` pinion 74 which' through a vshaft v75 inpturn drives, a suitablyshaped traverse' calm 76, Cam 76,

vwhich is shown'heartLshaped, 'engagesla cam-follower 77 mounted at o ne end offan arm 78V having its other end i's'al'so mounted an arm`80 which vthrough asuitable movement hereafterto `b"e"explained transmits traverse Yz tnoveinent through cables 10i). passingl over sheaves 81 oto" the' traverse angle beam 31. As already v.explained lin'c'onnection with Figs. 1 and 2, this in vturn vcontrols `vertical movement of supports 32 and cap lifting shaft'9 Y `at each spindle location.

" Referring now'te Pig; 5 I havel shawnv a known v-b'elt variable speed drive which forms vno* part of the present v'invention' except iii/connection with Yother apparatus and as ohe'ofY several` availablev means forperforming speed variations selectively, manually, or automatically.

This drivel indicated generally at 65-utili'zes the'motor an axially fixed 'pull`ey183 'and an axiallyY movable pulley v84. o The pulleys'hve conical innerisurfaces for 'mating against'a V-belt 85 which drives 'a correspond- `ing`ly` shaped pa.ir Vofpull'eys'` `on`va riafblesp`eed shaft 66V, -one of' these pulleys 8.7- being axially xed,and the other "8 8'being yieldable axially but'no'rmally biased in by a Ycompression Yspring 89. In accordanceV with the present invention the only additionv tofstandaijdv apparatus of Y "thisf natureV is the spur Vg'earo'69 beneath the handle 68.

{cap When the package is empty as the wind is just start- Y V`zing-With Te representing a tangential `resultantaforce 'which is the'amount of tension in the yarn withzthis 2 j`emptyr,(e) cone. Similarly, but with a different starting lpoint,.Nf and-Tf, respectively, indicate the radial and'tantgential forces where-Tf is the resultant Ytangential force whichis the tension in the yarn with a` full cone. 'I ha-ve Vfound that With proper co-rela-tionship of speed of 'Y cap with respect to speed of package and speed of yarn feed, as hereafter explained, each of the tangential oriyarn tension forces divides up into the radial vectors Ne or N! -p1usfa right angle vector Pei-Pf which may be thought of as a circumferentialforce at the lip ofthe cap and which'v "shaajssg Preferably'` the handleis engaged throughv the'means "of pawls (not shown) so that it Will'not rotateV when Ythefappa'ratusr isbeing drivenby the 'spur gear 69`but in Y `any 'event'some means is provided foieither thehandle 68o r"the gearY 69 driving a linkage" indicated generallyV 'at 90 and operable to change the'spacing between Pulleys respect to-shaft 63Y and hencepthe effective "diameter for the V-belt`l with vrespecttoy theV variable Vspeerloutput KReferringnopw to 'Figfe'l have shown'in'detail the fparticular mechanism whichv gives variation Vin speedV in v -conformity with traverse'a'n'd shape of cone as wellY as iformerly had to' be produced in the yarn. But with Ythe present' invention these circumferential vectors are .minimized'by mechanical movement of the cap to reduce excessive strainsfparticularly at the time of empty fbobbin. YOf course the radial tension is equal to the square root of the resultant pull Von the'yarn squared minus the circumferential component squared, andv Vas will hereafter become apparent I select a relationship Yof'speed of cap andrspeed of cone so as to practically reduce this circumferential component to zero andth'ereby minimize resultant pull on the yarn. Y Y

VDuring operation, the package cone 26 is driven as Y `previously explained by the upper pulley 24, for exanipleV :from one of several belts as YshownA in Fig. 4. Mean-V buildup androther factors. lnge'neral this-depends upon 'Y the facty that whenthe yarnris wound onthe smaller Vof'Fig '6. For this combined Yregulation a system of two diameter of the cone, theV r.`p.m.- speed of the Vcone is increased, and vice' versa, in ordentofatford Aconstan-t speed of t-he balloonf40b (see Figs. land V2) which is "formed Vin 'accordance'with conventional practice. Also, 'for increasing diameter of theV package (at any particular point along the'A cone) as layers of yarn are wound up, the rpm. speed of thegcone is decreased by the apparatus `ratchets 91 and 92 are arranged oppositly andfxed with *respect to` the gear 70. A gravity operated pawl 91p 'engagesinto the teethv offratohet 9.1'and ag-pawll92p yadaijlted to engage into theteethv of the ratchet 92.

' secured with respect to a base frame 106.

.spingere These nawls are both mounted upon an arm 9.3 which is fixed for rotation with the shaft 79 Aso that arm 93 oseillates in unison with arms 78 and 80 (see Fig. 4). Since the ratchets 91 and 92 are mounted firmly with respect to the spur gear 70, the variable speed upper shaft 66 is slowed and speeded up according to cam iniiuenced movement initiated by cam 75 driven at c onstant speed. This influences the traverse movement of angle-iron beam 31. The shape of traversing cam 76 actuating a rocking movement of arm 93 is such as to compensate for the dilerence in diameters during coning whereas additional means are provided for compensating for increased diameter of package with buildup and to do this I Ahave shown means for introducing a retarding movement for the shaft 79 and this means takes the form of a segment 94 covering Va part of the ratchet 92. Segment 94 is ixed on a relatively stationary arm 95 but with provision for manually providing slight annular adjustment through the means of adjusting slots 96. In operation when the pawl 92p comes up over the segment 94 on its movement to the left it comes out of engagement with the ratchet 92 for some distance and on its way back starts to move the ratchet some interval later. This permits the arm 93 to advance to the :right without advancing the spur gear 70 any steps to the right. The resultant movement may be one step counterclockwise for each traverse, or whatever is desired, but at any Yrate each turn to the left not compensated Yfor by a corresponding turn to the right causes gradual slowdown of the variable speed shaft 56, 4and consequently slows Vdown thespeed of the packages to compensate for buildup thereupon. lf the package is to have a square top corner no other means need be provided, but if, as shown in Figs. l and 2, the packageis to be provided with a tapered top it is necessary to provide some meansfor top end shortening of the traverse at different points for each layer during buildup. To accomplish this i have provided a segment 93 having one end secured to the cable 100 and having its other end connected to a rod 101. This segment 9S has two pins 98p supported in a bracket 99, supported by arm- 30 so as to be movable with respect thereto as an eccentric to aifect the distance at which rail 31 will reverse the traverse from up to down. Cable and rod 101 may be fastened to the eccentric riding segment 9d by eyelets in the latter as shown, and to provide proper traverse movement to form a cone shaped package (as shown in Fig. l). The far end of rod 101 has a roller 102 movable in an Archimedes spiral 103 cut in. the ratchet disc 92.

ln operation the mechanism may be brought to a starting position by using the hand crank 63 to raise the speed of the variable speed shaft .ed suiciently to compensate for the reduced diameter presented by an empty bobn. Additionally, the segment 9S must be in proper position and then as the conical package increases its diameter, the cable attaching eyelet e slowly transfers itself to the left decreasing the stroke of the cap` 30 and properly shaping the buildup `of yarn on the package.

lt has already been stated that the cam mechanism can be cranked back to a starting position by hand, but this is not always desirable and is sometimes impossible, for example in connection with continuous spinning machines where it is important to make changeovers to new empty spools as fast as possible. ln such case an arrangement as shown in Fig. 7 can be used. In Fig. 7 there is shown a quick changing spindle revolving mechanisrnwhich allows la spindle with a full package Zf (together with its cap Sff, cap liftinI shaft 9 and other associated apparatus) to be quickly moved from operative (driven) position at the right and to be replaced with an empty spindle 26e and its associated cap 30e. The revolving mechanism comprises a vertical shaft 105 Instead .of the rail 31 (of Figs. 1 and 2) the revolving mechanism vhas. Aa traversing cam 107 for long traverse and which is sleeve mounted to be driven `as by a motorized variable speed drive 65 through gears located, for example, in housings 109 and 115. Spur gears 108 may be used t0 interconnect a plurality of such spindle-units. Another set of gears which may be assumed mounted on the vertical shaft extending upwards out of gear box 109 at the proper speed drives a cap and spindle mounted on revolvable plate 110. For the exchange of empty for full packages, a 180 turn may be used and this may be performed `automatically while at the same time adjustable speed mechanism somewhat as shown in Figs. 4 and 6 is reset to starting position. Additional mechanism as shown in Fig. 8 may properly adjust the whole apparatus to provide a short traverse change to provide a tapered top and like tapered bottom to each package or, as shown in Fig. 9, While the motor driven shaft 63 drives one belt 60 and the vari-drive output shaft 66 drives another for one package 26 and cap 30, a human operator 120 is about to remove a full package 26' of different conguration. Here the revolver plate takes the form of a helical gear 110. Concentric with its axis of rotation, and mounted on the same post is the cam 107 which, as it rotates, traverses the rotating caps through their extended rods 9. Cam 107 may be rotated through a sleeve from a worm and gear 108, and in order to be able to get packages with tapered ends the cam is additionally rocked by a lever 209 so that its stroke ends will be varied.

The rotating caps and twisting spindles 26 are driven by two belt drives through pulleys 64 and 67, one of which has a constant speed of rotation. From the same motor shaft may be driven worm and gear'108 and top shaft 119 on which could be mounted a jaw clutch mechanisrn 120 which, when engaged by lever 121, is -able to make one full 360 turn and then stop. Forrendering automatic operation, a timing device 122 may be introduced and driven by a chain drive from the shaft of worm and gear 108 and have a number of reducing stages to provide a final speed of shaft 123 of one revolution per formation of package. An Archimedes spiral cam 123A may operate from the same shaft to operate lever 124 connected to 209 and 121 in the manner shown in Fig. 9.

In order to sever the end of yarn of already finished package, a knife 125 may be provided to cut the yarn as the package swings by on the revolver plate 110. For catching and holding severed yarn, a circular cup-shaped nozzle 126 can be provided with a vacuum applied thereto by an exhaust fan (not shown). Thus when a package is full, the jaw clutch 120 is started and makes one revolution, and this is transmitted to cause the revolver 110 to make a 180 turn, and as the full package comes out of the twisting position the yarn is severed. Yarn ends sucked into the cup 126 cause yarn to come into Contact with the rotating cap (of the empty spool just put in place), and as it is wrapped around the rotating empty spool it is automatically caught for takeup. Simultaneously lever 209 is raised, causing cam 107 to resume maximum stroke corresponding to starting length of traverse, and the traverse motion is gradually diminished as cam on shaft 123 turns its 360 when the new package will be fully formed and the cycle repeated.

To summarize operation it may be said that it is desired that cap speed be suicient with respect to the speed of package so-that the yarn-balloon will always be moving around the circumference of the cap, only very slowly but enough to prevent the cutting into the metal by the yarn as happens when yarn runs over a same position. To this end it is preferable that the circumferential component of forces (see Pe and Pf in Fig. 3) which according to some of the prior art had to be produced by the yarn itself are done away with to large extent by mechanical movement of the cap with consequent decrease of strain upon the yarn particularly at time of empty bobbin.

Vr.p.m. of cap Y Y i y twisting and con-ing in a single apparatus.

Y gears and spur gears `from'a vertical sleeve extending '7 iFoi-mulaw'ise,v the desired relations may be set upas Yfollows -V r.p.mi of :peripheral-speed at windup diam. of package.

' positive drive top roll; '1

(3) y l Y r.p.m. of cap w gnplm. of ballon (preferably caprr.p.m. not exactly the same as r.p.m. of ballon or a groove 'would be worn in they cap) :peripheral speed at windup' diameter linear'speed of feed 1r diameter at; windup f course the capwill always have a lowerrs'peedithran VVthe package, otherwise the yarn'could not wind onto the package; l t t I Turns per inch:

' r.p.m. of spindle (package) -speed of yarn in inches per minute As already pointed out friction and tension are therefV by reduced, twisting is performed correctly, and higher Y speeds of operation are possible because of reduced tensions, and at the sametime it is possible to combine The arrangement shown in Fig. 8 is basically the same as that of Fig`.7, but inY Fig. 8 a` device indicated gen-Y erally at 116 is sed for'the gradual lifting of caps. i In ordertoV obtain the tapered package top and tapered bottom lalready mentioned, the traverse cam 107 is pro- -vided'with a'ishort additional traverse, moving very slowly, asfmay beV caused for example by a double arm 117 engaging into a bottom Vpart of cam 107 whichis thus springV biased upward except as actuated v`by a slowly ro- Y, tating cam 118 makingfonly one revolution per Lformationf'of vpackage/and driven, forexarnple, through worm down from cam 107. t Y t f Y Y' [While Ifha've described .arrangements providing Va. con-Y s'tantcapspe'ed, the speed Yof the cap could be-varied in stead of, or inu addition to,varying the speed of the packaging cone. For while I'Yhave illustrated Yand de'- scribed. `particular embodiments, various modifications '60 vSpindle and cap below the` pigtail While imparting varimay obviously be made without departing from the true spirit and scope of-the invention intended to be delined inV the appended claims;

j Iclajm: Y

' 1.Y Apparatus for the processing of synthetic yarns and '65 of package and giving in Proper interval an impulsetfor comprising means for feedinglyarn at a constant speed, a'package spindle-having a yarn receiving .bobbin 'ar-V v ranged wtotreceive yarn in .the shape of a cone, said spindlebeing mounted for rotation about averticai axis below the yarn feeding means,'a concentric Vcap rotatable around t-he same axis kas the cone and reciprocal vertical- `lyzto traverse the cone with its lower edge, and means Y*for rotatingY cap and coneinl a predetermined lrelative V'speed-'varying relationship suchl that a balloon formed above the Vtraverse cap has slightly more angular velocity i 'thanthe angular velocityfof-the'cap all the .time during formation of cone-shapedryarn package, saidvmeans including Ya Ycam operated ratchet mechanism for varying the vangular velocity of the cone to'accommodate variant diameters at windup during cone traverse andalso during'buildup' of the yarn in layers upon the cone.

j 2. Apparatus in claim '1 further characterized by speed varying vmeans for one of the drives including a speed settingrgear andV a compound ratchet arranged with one V10 toothed ratchet andV associated pawlfor drivingfthe gear in one direction and an oppositely toothed ratchet and associated pawlfor driving the'gear in the opposite directionfand meansfor rendering one ot'said pawl and ratchet'combinations inoperativelfor a portion of angu- 1'5V `la-r traverseV ofthe pawl with respectV to teeth of the associatedV ratchet so the gear,'besides .its rocking motion in unison with traverse to provide uniform peripheralfspeed Yaccording toinStantaneous position onY the cone, turns 'one step'each traverse'to slow down the speedY of the 270 Vpackage as itis being built np.

' 3.'"Yarn twisting and tapered top package coning apparatus comprising in combination: Ya source of rotative power; a variable speed drive operable from the source Yof power andthavin'g a constant speed output shaft, a

variable speedoutput shaft, and 'a speed adjustment input comprising a toothed pinion; contour cam means'operable 'from said output shaft; pawl and ratchet means for drivrinfg the speed adjustment pinion from'operation of said cam contour means; alever arm'wassociated with the pawl nV Yand ratchet means'and carrying a bracket having an ar- 'cuate slot, a segment having a portion operableV along said slot responsive to positioning of Vsaid lever arm in turn responsive to operation of the cam contour Ymeans and furtherrthrough an'Archimedes spiral responsive to positioning ofthe pawl and ratchet means; cable means connected at one end to the segment; a traverse setting means connected to the other end of the cable means; a package spindle rotatable about a vertical axis; a rotatable traverse 4means, positioned vertically with respect to the spindle 40 and connected tobe moved vertically by said traverse setting means; and means for-rotating spindle and traverse means each fromY a dierent one ofthe two variable speed drive output shafts.-

l 4. Yarn twisting Yand package-coning apparatus com- A prising an eyelet pigtail, two rotatable spindles each for building up a conical package, twoV caps, one arranged l,concentric with eachof the spindles for independent roi tation, turntable means for rotating either one or the other Vof the spindles with associated cap under the pigtail, said 'turntable means comprising a quick-changing revolver carrying spindles and caps around an axis and comprising fa traversing vcam Ycoaxially mounted for rotation around the center of rotation of said revolver and arrangedV with rotation to Vary the heightsof the caps, means for impart- `ing to said cam its rotary motion, a short additional traverse device to form a tapered end of the conical package,

- y and turningfmeans for said revolver. Y

A V5.V Yarn twistingand package-coping apparatus as in claim 4-further having a driving mechanism for driving fable speedas between driven package and driven cap fmounted on the quick-changing revolver, said driving mechanism being timed according to denier twisted and including a timing device making one turn per formation Vautomatic turn Y1 80' with simultaneous Vreset of the tra-V versing cam and the variable drive mechanism to startingposition..V Y Y W I 6. Yarn twisting and package forming Yapparatus com- 7 0 prisingtwoY rotatable spindles for building up a tapered height-of-capadjusting relatively long -traverse Vrrlrans 9- 10 comprising a cam plate arranged concentric with the rewith respect to the package for forming tapered ends for volver plate and arranged to cause reciprocal traverse both end of the package.

of the cap with respect to the package for ordinary build- References Cited in the me of this patent up layer by layer, and a Vertical height of cap adjusting relatively short additional traverse means arranged to act 5 UNITED STA-TES PATENTS on said cam plate to cause variable traverse of the cap 865,048 Klein Sept. 3, 1907 1,829,986 Furness Nov. 3, 1931 

